Sewing-machine



I NN...

` H. SHAPIR() AND |l JOFFE.

SEWING MACHINE.

APPLlcnloN mso ^PR.11.1919.

Patented Nov. 9, 1920.

7 SHEETS-SHEETnL H. SHAPIRO AND I. IOFFE. SEWING MACHINE.

i I APPLICATION FILED APLI?. ISIS. 1,358,471.

Patented Nov. 9, 1920.

7 SHEETS-SHEET 2.

,IHIHIIIMIl i ulllliw" l E.. fbfw ATTORNEY' H. SHAPIROy AND l. JO'FFE. SEWING MACHINE.

APPLlcATloN man APn.11.1919.

1,358Q471 Patented Nov. 9, 1920.

I SHEETS-SHEET 3- wil' I A TTOEY H. sHAPlRO AND l. JOFFE.

SEWING MACHINE.

APPLICATION FILED APR. I7. I9I9.

Patented Nov. 9, 1920.

7 SHEETS-sneer 4. '/7 i 77777/ )i IN VEN TORS HP SHAPIRO AND In JOFFE. SEWING MACHINE-v APPLICATION PlLEn APP.11.'1919.

1,3585471, PatendNov. 9,1920.` 4 zsuEeTs-SHEET e.

BY M H. SHAPIRO AND I. 10F-FE. SEWING MACHINE.

APPLlcMloN FILED APRA?, 191s.

1,358.4?1. Patenten... 9,1920.

7 SH S-k-SHEET 7.

UNITED STATES PATENT OFFICE.

HENRY SHAPIRO AND ISAAC JOFFE, NEW YORK, N. Y.

SEWING-MACHINE.

Application led April 17,

T 0 all 107mm it may concern.'

Be it known that we, HENRY SHAPIRO "and IsAAc J'oFFE, citizens ofRussia and the United States, respectively, and residents of New York, in the county of New York and State of New York, have invented certain new-.and useful Improvements in Sewing Machines, of which the following is a specification. ,s

The present inventionrelates to improvements in sewing-machines, and more particularly to power transmitting devices for use with power-benches, carrying a numv ber of sewing-machines,driven independwhole, or a ently from a rotating shaft, that is disposed underneath the table portion of the bench.

One of the objectsrof the invention is to protect the operator from the rotating parts of the power transmitting apparatus by housing the same in a casing, that carries the clutch' operating and brake actuating mechanism, so that transmission nof power becomes impossible .in case the casing, as a part thereof is removed from the 'mechanism f Another object of the 4invention is to solv construct the transmitting mechanism that its driving shaft rotates within a tubular body, that serves to sustain the power transmitting apparatus, the end thrust of the elements of the said apparatus being taken upbyl the ysaid tubular body and stationary parts of the bench, whereby the said shaft has no other function but to transmit rotation to the driving elements' vof the power transmitting apparatus, and the operation of any one power transmitter on the bench does in no way interfere with Aor affect the operation of other transmitters* thereon.

A further object of the invention is to produce a power transmitting apparatus of the character described, which is simple' in construction, eicient in operation and which can be manufactured on a commercial l scale or, in other words, one which is not so diiicult to produce as to be beyond the reasonable cost of such a mechanism.

With these and other objects in view, which will more fully appearA as the nature of the invention is better understood, the

same consists in the combination, arrange` ment and construction of parts hereinafter described, pointed out in the appended claims and illustrated in the accompanying drawings, it being understood that many changes may be made in the' size and pro- Specification of Letters Patent.

patented Nov. 9, 1920. 1919. serial 1ra-290,779. l

portion of the several parts and details of construction withinv the scope of the apof F ig.' 3; and Figs. 6 to 8, inclusive,\ are central longitudinal sections taken through modified power transmitting devices. Referring now first to Figs. 1 to 5, inclusive, of the drawings, the numeral 10 indicates a bench, comprising a table portion 11, that is mounted upon legs 12. The legs are each made of two sections, that isV an upper section 13 and a lower section 14, which are 4adjustably secured together by bolts 15, or similar fastening devices, so as to permit the heights of the standards to be varied according to the requirements. In the table portion is provided a longitudinally extending trough 16, into which the finished goodsl are thrown by the operators. Upon the table portion are mounted sewing-machine `heads l17, arranged in two rows, one row on each side of the trough and each row being actuated from a driving shaft 18the said two shafts being, preferably, independent of each other, each being coupled to a motor, 19 of any suitable type, the said motors being disposed upon shelves 20 on one end of the work bench. The sewing-machine heads areal-ranged in such a manner that one of the same is disposed ori/each side ofV the trough 16 between two Iadjacent legs 12. It is obvious that, while in the drawings two rows of sewing-machines have been shown, one row may be employed if desired, and, inasmuch as each row is driven from a driving shaft that is independent of the other, the construction of one row only need be discussed herein.

The shaft 18 is connected by a couplingy 21 with the motor 19 and may be made of a plurality of sections, suitably joined. The

are mounted in any preferred manner on vsaid shaft isq'ournaled in bearings 22, which the pulley shaft. Between 80.4

ber, comprises a hangers 23,. carried by the upper sections 12. There is one hanger associated with each leg 12, as clearly appears from r ig. l, of the drawings.

With each sewing-machine head coperates a power transmitting apparatus 24, disposed adjacent one of the llegs 12. This apparatus includes a pulley 25, that is shiftably mounted in a manner presently to be described upon the shaft 18 and disposed in alinement with a' pulley head, through which power 1s transmitted for operating the stitch-forming and feeding mechanism. Over the said pulleys runs a belt 27, transmitting the rotation of the pulley 25 to the pulley 26. The hub 28 of 25 is drawn over a sleeve 29, it being iixedly attached tosaid sleeve for instance by a screw 30. The sleeve is'shiftably disposed upon the driving sha and provided upon one of its ends with an enlargement 31, in which is seated, a thrustbearing 32, for a purpose hereinafter to be described. In one of the faces of the pulley 25 is provided an annular groove 33, adapted to receive a ring-shaped body 34 of a driving clutch member 35,'that is keyed or otherwise fixedly attached to the driving the hub 36 of the driving clutch member and the adjacent bearing 22 is disposed a thrust bearing 37. The pulley 25 constitutes the driven clutch member of the apparatus.

The pulley 25 is disposed within a shield 38, that is attached to and supported b v a tubular member 39. This tubular member surrounds the driving shaft .and extends from the transmitting device 24 to the next bearing 22 in the series, to which it is attached by a coupling 40. That endv of the tubular member 39 which is adjacent the shield 38 is kept concentrically in relation to the driving shaft by a bushing 41, fixed to the said tubular member.

The means for shifting the pulley 25,l so as to engage with the driving clutch mem- 5 at 43 to standards 44, the latter being either made integral with or fixedly attached to the 'shiel The arm 45 of this lever is fork-shap d and extends into the shield,.its

prongs bearing against the thrust-bearing 32.- The otherl arm of the lever is connected by a rod 46 with a treadle 47 `of any suitable construction. The lever 42 carries also a brake-block 48, which is adapted to reachv the' within the belt receiving groove of pulley 25, it being normally held within said oove by a spring 49, that is Vfixed to the said lever and the shield.`

The operationof this lows he driving shaft on the work-bench isv rotating continuously and, in order transmit its rotation to any one of the sewing-machine heads thereon, the respective 26 on the machine ried by a casing-like shield, which,

treadle is despressed, whereby the respective brake-block 48 is disengaged from the pulley 25 and the latter shifted iito operative relation with the rotating driving clutch member 35. When in engagement, the rotation of the said clutch member is transmitted to the pulley and thus to the sewing-machine head. By releasing the treadle, the spring 49 returns the lever 42 to the position sho'wn in Fig. 3 of the drawings, whereby the pulley is forced out of operative relation with the driving clutch member.

Tt is to be observed that the engaging and disengaging of the pulley 25 with the driving clutch member of any transmitting devices on the work-bench does in no way affect the operation of the other power transmitting devices thereon, for the reason that the shifting mechanism is carin turn, is mounted upon a tubular member 39, the latter being disposed in such a manner upon the driving shaft that it does in no way interfere with the rotation of the same or tend to transmit the shifting movement of the clutch engaging means to the said shaft.` The power'transmitting devices 'on the bench are thus entirely independent of one another, and do in no way interfere with the independent operations of the several machine operators. The endwise thrust of the several tubular members 39 is taken up by the bearings 22, to which they are connected, and the endwise thrust upon the driving clutch members 35 is taken up also by the said bearings. The tubular members 39 serve, besides the functions mentioned, as a covering for the driving shaft, protecting the operators against accident.

Itis to be observed that the clutch engaging means and brake of each power transmitting apparatus are mounted'upon the cover-like shield thereof. It is thus impossible to actuate any power transmitting apparatus without having the protecting shield over the rotary parts thereof. The op'- erators are thus effectively guarded against accident.

The modification shown in Fig; 6 of the drawings, differs from the one above described mainly in that its driving clutch member 35 bears against a thrust bearing 37 that is disposed within an enlargement 39 of the tubular member 39. One of the rings 50 of this thrust bearing serves also to space the' unattached end of the tubular member 39 from the driving shaft. The bushing 41, to which the pulley 25 is fixed, Labuts against a thrust-bearing 51, against the ring 52 of which lies the hub?, of the protecting shield 38.

Vspring 56, 4having one of its ends attached to the shield 38 and its other end to a hanger 23, serves to hold the elements in" the positions shown in Fig. 6 of the drawings. The brake-block48, cooperating with the belt receiving groove of the pulley 25 is carried in this instance by a lever 57, that is fulcrumed at 58 to a leg -12 and connected by a link 59 with a lug 60 on the shield 3 A shield 6l is secured to the tubular membei' 39 and incloses the thrust bearing 37 and the driving clutch member 35.

In order to transmit the rotation of the driving shaft tothe pulley 25, the treadle associated with the lever 54 is depressed, whereby the shield 38 is caused to move toward the driving clutch member 35, moving in the samel direction the pulley until the latter is engaged by the driving clutch imenr ber. At the same time the lever 57 is lifted around its fulcrum 58, thereby disengaging the brake-block from the driving pulley. rFhe spring 56 returns the parts to their positions shown iii Fig. 6 of the drawings, Vwhen the treadle is released.

The advantagesof the device described in connection with the apparatus shown in F 1 to 5, inclusive of the drawings 'are present in this modification also.

The modification, shown in Fig. 7 of the drawings, differs from the one illustrated in Fig. 6, in that the bearing 22, adjacent the 'transmitting device, is provided with a tubular extension 62, that is spaced from the driving shaft and projects as far as the driving clutch member 35. The sleeve 53 is in this instance made, preferably, integral with the shield 38 and slidably mounted on the tubular extension '62. Furthermore, the bushing 41 is missing and the hub of the pulley 25 slidably mounted upon the said tubular extension. The construction of this device is, otherwise the same as of the modification shown in Fig. 6 of the drawings, and so are also the function and operation of the mechanism the saine. i

The modification shown in Fig. 8 of th drawings differs slightllfrom the construc- .tion shown in Fig. 6. ore particularly, in this case the thrust bearing 37 of-'the driving clutch` member 35 abuts against a bearing 22, arid the thrust bearing 51 of the pulley 25 abuts against the tubular body 39. The shield 38 is in this instance fixedly attached to the said tubular member, the latter being shiftable and connected with the treadle rofl 46 by a bell-crank lever 63, the

latter being fulcrumed at 64 to a bracket 65, y

carried by a leg 12. Otherwise theconstruction is the same.

By depressing the -treadle, the tubular body 39 is shifted, with the result that the clutch members are engaged and the brake disengaged. The spring 56 returns the elements to their positions shown in Fig. 8l of the drawings, when the treadle is released.

Attention is called to the fact that the driving clutch members, shown in the several figures of the drawi s, are each at- .tached` to the driving sha t` sections by a key 100, that is seated in a keyway 101vv in the said driving shaft section and in a slot 102 in the hiib lof the driving clutch meinber. Due t0 this arrangement, a thrust against the driving clutch member will not be transmitted to the driving shaft sections,

or in other words the-operation of any one of the power transmitting apparatuses on the power bench will be independent of the others thereon.

What we claim is l. In a power transmitting apparatus, the

tionary tubular body encircling said shaft,` a shield for said driven clutch member fixed to said tubular body, and means in engagement with said driven clutch member for shifting the same so as to establish driving connection between said clutch members, said shifting means being mounted upon said tubular body.

2. In a power transmittinglapparatus, the combination with two bearings, of a shaft rotatably mounted therein, a driving clutch member on said shaft adjacent one of said bearings, means for fixing said driving clutch member to said shaft so as to prevent a thrust thereon to be transmitted to said shaft, a driven clutch member shiftable on, said shaft in the direction of the longitudinal axis of the latter, a stationary tubular body encircling said shaft and extending from said driven clutch member to the other one of said bearings, a shield for said driven clutch member fixed to said tubular body, and means in engagement with said driven clutch member for shifting" the same so as to establish driving connection between said clutch members, said 'shifting means being mounted upon said tubular body.

3. A power transmitting apparatus ac-A cording to claim 1, v comprising a thrust bearing inserted between said driving clutch member and the bearing adjacent the saine, and a second thrust bearing abutting against said driven clutch member and said shifting means.

4. A power transmitting apparatus according to claim 2, comprising a thrust bearing inserted between4 said driving clutch member and the bearing adjacent the same, and a second thrust bearing abutting against said driven clutch member and said shifting means. i

5. A power transmitting apparatus according to claim 1, comprising a brake coacting with said driven clutch member, said brake being carried by said tubular body.

6. A power transmitting apparatus ac cording to claim 2, comprisingV a brake coacting with said driven clutch member, said brake being carried by said'tubular body.

7. In a power transmitting apparatus, the combination with two bearings, of a shaft rotatably mounted therein, a driving clutch member on said shaft, means for fixing said driving clutchmember to said shaft so as to prevent a thrust thereon to be transmitted to said shaft, a driven clutch member shiftable on said shaft in'the direction of the longitudinal axis of the latter, and shifting means for said driven clutch member mounted independently of said shaft.

' 8. In a power transmitting apparatus, the combination with tw'o bearings, of a shaft rotatably mounted therein, a driving clutch member fixed to said-shaft, a driven clutch member shiftable on said shaft in the direc tion -of the longitudinal axis of the latter, and coperating shifting means and a brake for said driven clutch member mounted independently of said shaft, said brake being movable in relation to said driven clutch member.

9. In a powertransmitting apparatus, the combination with two bearings, of a shaft rotatably mounted therein, a driving clutch member fixed to said shaft, member shiftable on said shaft in the direction of the longitudinal axis of the latter, a shield for 'said driven clutch member mounted independently of said shaftyand means in engagement with said shield for shifting a driven clutch said driven clutch member into driving engagement with said driving clutch member.

10. In a power transmitting apparatus, the combination with two bearings, of a shaft rotatably mounted therein, a driving clutch member fixed to said shaft, a driven clutch member shiftable on said shaft in the direction of the longitudinal axis of the latter, a shield for said clutch member mounted independently of said shaft, and co-acting shifting means and a brake for. said driven clutch member in operative relation to said shield so that by disengaging said shield the transmitting apparatus becomes inoperative.

1l. In a power transmitting apparatus, the combination with a plurality of bearings, of a shaft rotatably lournaled therein, a driving clutch member xed to said shaft adjacent each bearing, a plurality of driven clutch members shiftable onl said shaft in the direction of the longitudinal axis of the latter, each driven clutch member being mounted adjacent its respective driving clutch member, a plurality of stationary tubular bodies encircling said shaft, each tubular body extending from the respective driven clutch member to the next bearing in the series and being attached to the latter, a shield for each driven clutch member fixed to its respective tubular body, and independent meansin engagement with each driven clutch member for shifting the same so as to establish a driving connection between respecti've clutch members, being mounted upon its respective tubular body.

Signed at New York, in the county of New York and State of New York, this 4th day of April A. D. '1919.

HERY sHAPIRo. ISAAC JoFFE.

each shifting means 

